Video tutorial presents introduction to MDX (MultiDimensional Expressions) with practical examples. MDX is a query language for OLAP databases, much like SQL is a query language for relational databases. It is also a calculation language, with syntax similar to spreadsheet formulas.Free lesson presents how to use MDX queries for querying and manipulating the multidimensional data stored in OLAP cubes. It describes how to select data using Rows and Columns axes, and how to use methods: Members, NonEmpty, AddCalculatedMembers, AllMembers.